With only a preview of Kinect Sports: Rivals available, the job of introducing players to the joys of Kinect 2.0, falls to Fighter Within. It's a beat 'em-up in which you perform actual punches, kicks and dodges to control your character on screen rather than slumping on the sofa and letting your thumbs do the fighting. The idea is that you get a crafty bit of exercise shoehorned in with the fun. Even after downloading a 3Gb patch and painstakingly retuning the new Kinect, it just doesn't work. A fighter will routinely ignore your aerobic attempts to coax him or her into action, mutely standing there while being battered into unconsciousness. This problem is lessened in two-player mode, but only because you're both equally hampered by Kinect's stubborn refusal to acknowledge more than random elements of your manic flailing. It's mystifyingly poor to the point of being unplayable.